Boiler-check.



MARTN A. FINGER, 0F

ernten SPICER, OF WILLIVIAR, MINNESOTA.

BUTLER-CHECK.

Specification of Letters Patent.

Patented lipr. 25, 119th..

Application led March 23, 1914. Serial No. 826,746.

To all lwhom t may concern.'

Be it known that l, MARTIN A. Eileen, a citizen of the United States, residing at `Willmar, in the county of Kandiyohi, in the State of Minnesota, have invented new and useful Improvements in Boiler-Checks, of which the following is a specification.

My invention relates to improvements in boiler checks, and has as an object to provide anv improved check valve in which scales and other foreign mattei' in the water cannot lodge on the valve seat and thereby prevent the seatingr of the valve.

lt is a further object of my invention to provide a check valve which may be easilv removed and which is capable of ready adjustment.

lt is also an object ot my invention to provide a check valve which is durable, etlicient and comparativelysimple in construction, and through which duid may readily nass. l l obtain the above and other objects by the structure disclosed in the accompanying drawings, in which,-

Figure l is a vertical sectional view of my improved check valve with the valve seated.

eti

Fig. `2 is a vertical sectional view ot the same with the valve lifted. Fig. 3 is a horizontal sectional View on line 3-3 ot Fig. l. Fig. l is a vertical sectional view of the valve chamber with the valve and valve seat removed. y

Similar letters refer to similar parts throughout the several views.

My improved check valve is composed substantially of a casing or valve chamber 1, a valve seat 2, and a valve 3. The valve casing 1 comprises a cylindrical shell having a central opening therethrough, the diameter of the central opening being somewhat enlarged for a portion of the length et the opening and intermediate the ends ot the basing whereby to provide a counterbore i. 1Within the enlarged bore 4 and termed integral with the walls of the chamber l are diametrically disposed `uides 5 whichextend downwardly toward the intake end of the valve but which terminate some distance above the lower edge or point ot intake of the enlarged bore Ll, thereby providing around the valve seat an uninterrupted water-space 6.

rlhe lower ends of the guides 5 are beveled or V-shaped as at 7, so as to facilitate the passage of the water through the valve. At the upper ends of the guides areinwardly extending integral stops 8 which are adapt ed1 to limit the upward-movement of the Vil Ve.

The casing 1 at the inlet end thereof is threaded to receive a correspondingly threaded valve seat 2, the valve seat comprising a cylindrical member upon the inner end of which the valve 3 is adapted to rest. 'llhe inner end ot the member Q is adapted to extend slightly into the enlarged bore 4, so as to be elevated above the lower edge of the latter. It will be noted that as the guides do not extend throughout the en tire length of the enlarged bore, but terminate somewhat short of the lower edge thereof, and since the inner end ofi the member 2 extends slightly into the enlarged bore, the water space 6 extends for some distance above and below the point of intake between the valve seat and the valve 3 and to the wall of the valve chamber, and that this water space is uninterrupted by any guides, stops, or other parts ot the boiler check. Therefore, scales or other mattei' in the water pass freely beyond the valve seat into the uninterrupted water space 6 without lodging on the valve seat and thus preventing the valve from seating itself.

ln operation, the water under pressure passes upward through the casing, raises the valve 3 and passes between the valve and the valve seat into the uninterrupted waterspace 6, and upward through that portion ot the enlarged bore ,i about thel valve 3, and thence over the valve and out through the outlet of the casing.

ln boiler checks where the valve guides -are placed below the valve seat the principle of this improvement can be applied by cutting away the outer edges of the valve guides at the point of intake to an extent coextens'ive with the water space when the valve is lifted.

It is, of course, 'obvious that my invention is susceptible of various modifications andv changes within the spirit of my invention, without departing from the scope of the tol. lowing claims.

What l claim as new is,-

l. A check valve comprising a casing having a through opening and a counterbore intermediate the ends of the opening, a valve seat fitted in one end ot the opening and projecting at its inner end into the counterbore to provide a free passage about the inner end of said valve seat, a valve in the opening in line with said seat, and guides in the counterbore for said valve terminating at a point above the lower or seating end of the valve when the latter is fully open.

2. A cheek valve comprising a casing having an opening therethrough and a counterbore between the ends of the opening, a valve in the oounterbore, guides in the counterbore for said valve terminating at a point above the lovver or seating end of the valve When the latter is fully open, said guides having beveled ends facing` the valve seat to deflect the fluid about the guides and reduce the resistance of the guides to the passage of the fluid through the casing.

and spaced-apart 3. A check valve comprising a cylindrical casing having a through opening and a eounterbore intermediate the ends of the opening, a valve seat in threaded engagement with and adapted for adjustment in one end of the opening'and projecting at its inner end into the Counterbore to provide a free passage about the inner end of said valve seat7 a valve in the opening in line with said seat, spaced-apart guides in the counterbore integral With said easing and terminating at a point above the lower or seating edge of the valve when the latter is fully open, and stops at the upper end of said guides and integral therewith adapted to limit the movement of the valve.

MARTIN A. ENGER.

Witnesses vOSCAR C. RONKEN,

REUBEN W. PALMERB lCopies of this patent may be obtained for ve cents each, by addressing the Commissioner ot Patents,

1 Washington. D( G. 

